8260 CPM DP ram free function

[Rune Torgersen]

> I suppose once Dan's comments are addressed, since I thought
> he's been the biggest objector to all of the previous
> implementations (or, my memory is faulty, and every one of
> them just fell on the ground), we can push this out, at least
> for cpm2 stuff.

I have fixed the #ifdefs Dan complained about, but I cannot really do
much about changing hostalloc to kfree for the stuff in the kernel,
since hostalloc gets called a few times before kalloc is initialized.

What else should I do before resubmitting?

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